DETROIT
DIESEL
GENERAL DESCRIPTION
bearings, connecting rod bearings, and camshaft
The two-cycle diesel engines covered in this manual
bearings, and to other moving parts.
have the same bore and stroke and many of the major
working parts such as injectors, pistons, connecting
Oil is drawn by suction from the oil pan through the
rods,
cylinder
liners
and
other
parts
are
intake screen and pipe to the oil pump where it is
interchangeable.
pressurized and delivered to the oil filter and the oil
cooler. From the oil cooler, the oil enters oil galleries in
The In-line engines, including the inclined marine
the cylinder block and cylinder head for distribution to
models, include standard accessories such as the
the main bearings, connecting rod bearings, camshaft
blower, water pump, governor and fuel pump, which, on
bearings, rocker arm mechanism and other functional
some models, may be located of either side of the
parts.
engine regardless of the direction the crankshaft rotates.
Further flexibility in meeting installation requirements is
The cooling system has a centrifugal water pump which
achieved with the cylinder head which can be installed
circulates the engine coolant through the oil cooler and
to accommodate the exhaust manifold on either side of
water jackets. The engine temperature is regulated by a
the engine.
thermostat(s).
The V-type engine uses many In-line engine parts,
Fuel is drawn from the supply tank through the fuel
including the 3-53 cylinder head.
The blower is
strainer and enters a gear type fuel pump at the inlet
mounted on top of the engine between the two banks of
side. Upon leaving the pump under pressure, the fuel is
cylinders and is driven by the gear train. The governor
forced through the fuel filter into the inlet manifold
is mounted on the rear end of the 6V-53 blower, The
where it passes through fuel pipes into the inlet side of
meaning-f each digit in the model numbering system is
the fuel injectors. The fuel is filtered through elements
shown i Figs. 2 and 3. The letter L or R indicates left
in the injectors and then atomized through small spray
or right-hand engine rotation as viewed from the front of
tip orifices into the combustion chamber. Excess fuel is
the engine. The letter A,B,C or D designates the blower
returned to the fuel tank through the fuel outlet galleries
and exhaust manifold location on the In-line engines as
and connecting lines.
viewed from the rear of the engine while the letter A or
C designates the location of the oil cool-t and starter on
Air for scavenging and combustion is supplied by a
the 6V-53 engine.
blower which pumps air into the engine cylinders via the
air box and cylinder liner ports. All air entering the
Each engine is equipped with an oil cooler, replaceable
blower first passes through an air cleaner or air silencer.
element type lubricating oil filter, fuel oil strainer, fuel oil
filter, an air cleaner or air silencer, a governor, a heat
The engine may be started by either a hydraulic or an
exchanger and raw water pump or a fan and radiator,
electric starting system.
and a starting motor.
The engine speed is regulated by a mechanical or
Full pressure lubrication is supplied to all main
hydraulic type engine governor, depending upon the
engine application.
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